How does a Queue<T> work internally? Follow:

Short answer: Internally, Queue<T> uses a circular array to efficiently manage memory and operations. Head pointer marks the front (next item to be dequeued).

Real-world example (ShopNest)

ShopNest uses a Queue<Order> for “orders waiting for payment confirmation,” and a Stack<Uri> for back-navigation in the admin UI.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.